TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
9.
LHS ENGAGED INDICATOR LIGHT DOES NOT OPERATE (MODEL A ONLY)
(continued).
3.
KNOWN INFO
TEST OPTIONS
CB 15 OK.
Are there 2228
Voltage Test.
L.H.S. ENGAGED
volts supplied to
REASON FOR QUESTION
indicator bulb OK.
LHS indicator bulb?
To isolate the failure to the
POSSIBLE PROBLEMS
power or ground portion of
Cab control box faulty.
the indicator light circuit.
Supply harness faulty.
Cab control box wiring
faulty.
LHS MODE SELECT
switch faulty.
Go to Step 5.
NO
YES
Change 1
4-156
